Lock-nut.



T. T. MITCHELL.

LUCK NUT.

APPLICATION YFILED m3. 15. 1915.

1,155,949. Patented Oct. 5, 1915.

THOMAS '1. MITCHELL, OF JOAQUIN, TEXAS, ASSIGNOR OF ONE-HALF .TO MARVINR.

CRAWFORD, OF JOAQUIN, TEXAS.

LOCK-NUT.

Specification of Letters Patent.

Patenteoct.5, 1915.

Application filed February 15, 1915. Serial No. 8,359.

To all whom it may concern:

Be it known that I, THoMAs T. MITCHELL, a citizen of the United States,residingat Joaquin, in the county of Shelby and State of Texas, haveinvented certain new and useful Improvements in Lock-Nuts; and-I dohereby declare the following to be a full, clear, and exact descriptionof the invention,

such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to lock nuts, and has for its object to provide,a nut with novel and efficient means for reliably locking the nutagainst rotation upon the bolt.

With these and other objects in view,'the invention consists of thenovel construction, arrangement and formation of parts as will behereinafter specifically described, claimed and illustrated in theaccompanying drawing, in which:

Figure 1 represents a sectional view on the line 11 of Fig. 2,illustrating the lock nut applied to use. Fig. 2 represents an endelevation of the nut lock, partly in section. Fig. 3 represents a sideelevation taken at right angles to Fig. 1, showing the nut partly insection. Fig. 4 represents a perspective view of one of the locking pinsor keys removed. Fig. 5 represents a perspective view of a slightlymodified type of looking pin, and Fig. 6 represents a perspective viewof the pin locking plate removed.

Referring to the drawing in detail, wherein similar reference numeralsdesignate corresponding parts throughout the several views, the numeral5 indicates the shank of a bolt of the usual or any preferredconstruction having a head 6 at one end and screwthreads 7 extendinginwardly from the opposite end. A preferred type of nut 8 is threadedupon the shank 5 and is formed 7 with the usual internally screwthreadedbore 9 extending axially therethrough. An op'ening 10 is formed throughthe nut 8 parallel with the bore 9 thereof and is preferably rectangularin cross section, as clearly illus-' trated in Fig. 2, to snugly receivethe pin locking plate 11 having one end rounded, as indicated at 12, andformed adjacent its 0pposite end with a notch 13. On one side of therectangular opening 10 the nut 8 is formed with a pair of spacedopenings 14 extending at right angles to the opening 10 and intersectingthe latter and the internally screwthreaded bore 9. On the opposite sideof the rectangular opening '10, and between I preferably rectangular incross section and formed withinner pointed ends 17 are slidably mountedwithin the openings 14 and 15 and are formedupon the longitudinal edgesadjacent the openinglO-With notches 18 defining transverse shoulders 19disposed inwardly of the inner wall ofth erectangular opening 10 whenthe pins are operatively p0- sitioned in the nut 8. The pinlockingplate11 is removably engaged within the rectangular opening 10, engages theshoulders 19 of the locking pins and is secured] against removal by alocking member 20 pivotally secured at 21 in a recess formed in theouter face of the nut and adapted to engagewithin the notch 13 oftheplate 11. The type of locking pin illustrated in Fig. 5 is formed uponits opposite longitudinal edges with notches 22 defining transverseshoulders 23 and having its inner endy24 pointed. This threads of thebolt shank 5 to reliably lock the nut against rotation. When the shouldersl9 or 23 of the locking pins are disposed.

flush with or inwardly of the inner wall of the rectangular opening 10the locking plate 11 is slipped into the rectangular opening 10,vengages the transverse shoulders 19 of the locking pins and thusreliably lock the latter against removal. The pivoted locking member 20is subsequently swung to the position illustrated in Fig. 2 so as toengage within the notch 13 of the locking'plate 11V and thus reliablysecure the latter against loss. or removal. r i What I claim is: 1. Alook nut comp-rising a nut having an axial bore and a plurality oftransverse openings intersecting said bore, a locking pin slidablymounted in each of the transverse openings having its inner end pointed,

notches in said pins, and a plate slidably mounted in said nut adaptedto engage said notches to lock said pins against removal.

2. A nut lock including a nut having an axial bore and a plurality ofopenings intersecting said bore, a plurality of locking pins slidablymounted in said openings and having their inner ends pointed, said nuthaving a rectangular opening extending parallel With the axial borethereof and extending between several of the openings, said locking pinshaving notches on the longitudinal edges adjacent the rectangularopening defining transverse shoulders, a locking plate slidably mountedin said rectangular opening adapted to engage the transverse shouldersof said pins to lock the latter against removal, and a spring platepivotally secured to the outer face of said nut adapted to engage saidplate to lock the lat: ter against removal.

3. A lock nut comprising a nut having an axial bore and a plurality oftransverse openings intersecting said bore, a locking pin slidablymounted in each of the transverse openings having its inner end pointedand adapted to engage in the shank of a bolt, notches formed insaidpins, a plate slidably mounted in said nut for engaging and lockingsaid pins against removal, and means for locking said plate againstremoval from said nut.

&. A look nut comprising a nut having an axial bore and a plurality oftransverse openings intersecting said bore, a locking pin slidablymounted in each of the transverse openings having its inner end pointed,notches formed on the longitudinal edges of said pins defining aplurality of outwardly facing shoulders, a plate slidably mounted insaid nut adapted to engage behind said shoulders to lock said pinsagainst removal, and means to lock said plate against removal from saidnut.

In testimony whereof I aflix my signature in presence of tWo Witnesses.

THOMAS T. MITCHELL.

Witnesses: i

G. G. MIQ ELLENY, J. G. Bnoox.

Copies of this patent may be obtained for five cents each, by flame insthe Commissioner of n Washington, p 0}

